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- W2011718809 abstract "Summary Background : Although antidepressants are used for functional gastrointestinal disorders, the mechanisms of their effects on gut are incompletely understood. Aim : To assess the effects of two types of antidepressants (tricyclic, serotoninergic) on anorectal motility and visceral perception. Methods : A placebo‐controlled, randomized, double‐blind, crossover study was performed in 12 healthy male volunteers who received a single oral dose of amitriptyline (80 mg), fluoxetine (40 mg) or placebo. Drug effects were assessed using phasic isobaric distensions of the rectum with an electronic barostat (11 levels from 1 to 51 mmHg) 4 h after drug intake. Maximal rectal volume and pressure, mean and residual pressures at upper anal canal, mean pressure at lower anal canal, defecation sensation (5‐level scale) and visceral perception (visual analogue scale) were recorded at each level of distending pressure. Results : Ten subjects completed the study. Compared with placebo, neither amitriptyline nor fluoxetine modified rectal compliance or visceral perception. Compared with placebo, antidepressants significantly reduced mean and residual pressures at upper anal canal (−18%, P = 0.0019, and −27%, P = 0.0002, respectively, for amitriptyline; −26%, P = 0.0001, and −33%, P = 0.0001, respectively, for fluoxetine) whereas only amitriptyline significantly reduced mean pressure at lower anal canal (−16%, P = 0.0008). Conclusion : Both antidepressants similarly relaxed the internal anal sphincter, probably through a non‐specific mechanism, without modifying visceral perception. Only amitriptyline relaxed the external anal sphincter." @default.
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- W2011718809 date "2004-09-01" @default.
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- W2011718809 title "Differential effects of two types of antidepressants, amitriptyline and fluoxetine, on anorectal motility and visceral perception" @default.
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- W2011718809 doi "https://doi.org/10.1111/j.1365-2036.2004.02151.x" @default.
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